1 /*- 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1992, 1993, 1994, 1995, 1996 5 * Keith Bostic. All rights reserved. 6 * 7 * See the LICENSE file for redistribution information. 8 */ 9 10 #include "config.h" 11 12 #ifndef lint 13 static const char sccsid[] = "$Id: ex_write.c,v 10.43 2015/04/03 15:18:45 zy Exp $"; 14 #endif /* not lint */ 15 16 #include <sys/types.h> 17 #include <sys/queue.h> 18 #include <sys/stat.h> 19 20 #include <bitstring.h> 21 #include <ctype.h> 22 #include <errno.h> 23 #include <fcntl.h> 24 #include <limits.h> 25 #include <stdio.h> 26 #include <stdlib.h> 27 #include <string.h> 28 #include <unistd.h> 29 30 #include "../common/common.h" 31 32 enum which {WN, WQ, WRITE, XIT}; 33 static int exwr(SCR *, EXCMD *, enum which); 34 35 /* 36 * ex_wn -- :wn[!] [>>] [file] 37 * Write to a file and switch to the next one. 38 * 39 * PUBLIC: int ex_wn(SCR *, EXCMD *); 40 */ 41 int 42 ex_wn(SCR *sp, EXCMD *cmdp) 43 { 44 if (exwr(sp, cmdp, WN)) 45 return (1); 46 if (file_m3(sp, 0)) 47 return (1); 48 49 /* The file name isn't a new file to edit. */ 50 cmdp->argc = 0; 51 52 return (ex_next(sp, cmdp)); 53 } 54 55 /* 56 * ex_wq -- :wq[!] [>>] [file] 57 * Write to a file and quit. 58 * 59 * PUBLIC: int ex_wq(SCR *, EXCMD *); 60 */ 61 int 62 ex_wq(SCR *sp, EXCMD *cmdp) 63 { 64 int force; 65 66 if (exwr(sp, cmdp, WQ)) 67 return (1); 68 if (file_m3(sp, 0)) 69 return (1); 70 71 force = FL_ISSET(cmdp->iflags, E_C_FORCE); 72 73 if (ex_ncheck(sp, force)) 74 return (1); 75 76 F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); 77 return (0); 78 } 79 80 /* 81 * ex_write -- :write[!] [>>] [file] 82 * :write [!] [cmd] 83 * Write to a file. 84 * 85 * PUBLIC: int ex_write(SCR *, EXCMD *); 86 */ 87 int 88 ex_write(SCR *sp, EXCMD *cmdp) 89 { 90 return (exwr(sp, cmdp, WRITE)); 91 } 92 93 94 /* 95 * ex_xit -- :x[it]! [file] 96 * Write out any modifications and quit. 97 * 98 * PUBLIC: int ex_xit(SCR *, EXCMD *); 99 */ 100 int 101 ex_xit(SCR *sp, EXCMD *cmdp) 102 { 103 int force; 104 105 NEEDFILE(sp, cmdp); 106 107 if (F_ISSET(sp->ep, F_MODIFIED) && exwr(sp, cmdp, XIT)) 108 return (1); 109 if (file_m3(sp, 0)) 110 return (1); 111 112 force = FL_ISSET(cmdp->iflags, E_C_FORCE); 113 114 if (ex_ncheck(sp, force)) 115 return (1); 116 117 F_SET(sp, force ? SC_EXIT_FORCE : SC_EXIT); 118 return (0); 119 } 120 121 /* 122 * exwr -- 123 * The guts of the ex write commands. 124 */ 125 static int 126 exwr(SCR *sp, EXCMD *cmdp, enum which cmd) 127 { 128 MARK rm; 129 int flags; 130 char *name; 131 CHAR_T *p = NULL; 132 size_t nlen; 133 char *n; 134 int rc; 135 EX_PRIVATE *exp; 136 137 NEEDFILE(sp, cmdp); 138 139 /* All write commands can have an associated '!'. */ 140 LF_INIT(FS_POSSIBLE); 141 if (FL_ISSET(cmdp->iflags, E_C_FORCE)) 142 LF_SET(FS_FORCE); 143 144 /* Skip any leading whitespace. */ 145 if (cmdp->argc != 0) 146 for (p = cmdp->argv[0]->bp; *p != '\0' && cmdskip(*p); ++p); 147 148 /* If "write !" it's a pipe to a utility. */ 149 if (cmdp->argc != 0 && cmd == WRITE && *p == '!') { 150 /* Secure means no shell access. */ 151 if (O_ISSET(sp, O_SECURE)) { 152 ex_wemsg(sp, cmdp->cmd->name, EXM_SECURE_F); 153 return (1); 154 } 155 156 /* Expand the argument. */ 157 for (++p; *p && cmdskip(*p); ++p); 158 if (*p == '\0') { 159 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE); 160 return (1); 161 } 162 if (argv_exp1(sp, cmdp, p, STRLEN(p), 1)) 163 return (1); 164 165 /* Set the last bang command */ 166 exp = EXP(sp); 167 free(exp->lastbcomm); 168 exp->lastbcomm = v_wstrdup(sp, cmdp->argv[1]->bp, 169 cmdp->argv[1]->len); 170 171 /* 172 * Historically, vi waited after a write filter even if there 173 * wasn't any output from the command. People complained when 174 * nvi waited only if there was output, wanting the visual cue 175 * that the program hadn't written anything. 176 */ 177 F_SET(sp, SC_EX_WAIT_YES); 178 179 /* 180 * !!! 181 * Ignore the return cursor position, the cursor doesn't 182 * move. 183 */ 184 if (ex_filter(sp, cmdp, &cmdp->addr1, 185 &cmdp->addr2, &rm, cmdp->argv[1]->bp, FILTER_WRITE)) 186 return (1); 187 188 /* Ex terminates with a bang, even if the command fails. */ 189 if (!F_ISSET(sp, SC_VI) && !F_ISSET(sp, SC_EX_SILENT)) 190 (void)ex_puts(sp, "!\n"); 191 192 return (0); 193 } 194 195 /* Set the FS_ALL flag if we're writing the entire file. */ 196 if (cmdp->addr1.lno <= 1 && !db_exist(sp, cmdp->addr2.lno + 1)) 197 LF_SET(FS_ALL); 198 199 /* If "write >>" it's an append to a file. */ 200 if (cmdp->argc != 0 && cmd != XIT && p[0] == '>' && p[1] == '>') { 201 LF_SET(FS_APPEND); 202 203 /* Skip ">>" and whitespace. */ 204 for (p += 2; *p && cmdskip(*p); ++p); 205 } 206 207 /* If no other arguments, just write the file back. */ 208 if (cmdp->argc == 0 || *p == '\0') 209 return (file_write(sp, 210 &cmdp->addr1, &cmdp->addr2, NULL, flags)); 211 212 /* Build an argv so we get an argument count and file expansion. */ 213 if (argv_exp2(sp, cmdp, p, STRLEN(p))) 214 return (1); 215 216 /* 217 * 0 args: impossible. 218 * 1 args: impossible (I hope). 219 * 2 args: read it. 220 * >2 args: object, too many args. 221 * 222 * The 1 args case depends on the argv_sexp() function refusing 223 * to return success without at least one non-blank character. 224 */ 225 switch (cmdp->argc) { 226 case 0: 227 case 1: 228 abort(); 229 /* NOTREACHED */ 230 case 2: 231 INT2CHAR(sp, cmdp->argv[1]->bp, cmdp->argv[1]->len+1, 232 n, nlen); 233 name = v_strdup(sp, n, nlen - 1); 234 235 /* 236 * !!! 237 * Historically, the read and write commands renamed 238 * "unnamed" files, or, if the file had a name, set 239 * the alternate file name. 240 */ 241 if (F_ISSET(sp->frp, FR_TMPFILE) && 242 !F_ISSET(sp->frp, FR_EXNAMED)) { 243 if ((n = v_strdup(sp, name, nlen - 1)) != NULL) { 244 free(sp->frp->name); 245 sp->frp->name = n; 246 } 247 /* 248 * The file has a real name, it's no longer a 249 * temporary, clear the temporary file flags. 250 * 251 * !!! 252 * If we're writing the whole file, FR_NAMECHANGE 253 * will be cleared by the write routine -- this is 254 * historic practice. 255 */ 256 F_CLR(sp->frp, FR_TMPEXIT | FR_TMPFILE); 257 F_SET(sp->frp, FR_NAMECHANGE | FR_EXNAMED); 258 259 /* Notify the screen. */ 260 (void)sp->gp->scr_rename(sp, sp->frp->name, 1); 261 } else 262 set_alt_name(sp, name); 263 break; 264 default: 265 INT2CHAR(sp, p, STRLEN(p) + 1, n, nlen); 266 ex_emsg(sp, n, EXM_FILECOUNT); 267 return (1); 268 } 269 270 rc = file_write(sp, &cmdp->addr1, &cmdp->addr2, name, flags); 271 272 free(name); 273 274 return rc; 275 } 276 277 /* 278 * ex_writefp -- 279 * Write a range of lines to a FILE *. 280 * 281 * PUBLIC: int ex_writefp(SCR *, 282 * PUBLIC: char *, FILE *, MARK *, MARK *, u_long *, u_long *, int); 283 */ 284 int 285 ex_writefp(SCR *sp, char *name, FILE *fp, MARK *fm, MARK *tm, u_long *nlno, u_long *nch, int silent) 286 { 287 struct stat sb; 288 GS *gp; 289 u_long ccnt; /* XXX: can't print off_t portably. */ 290 recno_t fline, tline, lcnt; 291 size_t len; 292 int rval; 293 char *msg, *p; 294 295 gp = sp->gp; 296 fline = fm->lno; 297 tline = tm->lno; 298 299 if (nlno != NULL) { 300 *nch = 0; 301 *nlno = 0; 302 } 303 304 /* 305 * The vi filter code has multiple processes running simultaneously, 306 * and one of them calls ex_writefp(). The "unsafe" function calls 307 * in this code are to db_get() and msgq(). Db_get() is safe, see 308 * the comment in ex_filter.c:ex_filter() for details. We don't call 309 * msgq if the multiple process bit in the EXF is set. 310 * 311 * !!! 312 * Historic vi permitted files of 0 length to be written. However, 313 * since the way vi got around dealing with "empty" files was to 314 * always have a line in the file no matter what, it wrote them as 315 * files of a single, empty line. We write empty files. 316 * 317 * "Alex, I'll take vi trivia for $1000." 318 */ 319 ccnt = 0; 320 lcnt = 0; 321 msg = "253|Writing..."; 322 if (tline != 0) 323 for (; fline <= tline; ++fline, ++lcnt) { 324 /* Caller has to provide any interrupt message. */ 325 if ((lcnt + 1) % INTERRUPT_CHECK == 0) { 326 if (INTERRUPTED(sp)) 327 break; 328 if (!silent) { 329 gp->scr_busy(sp, msg, msg == NULL ? 330 BUSY_UPDATE : BUSY_ON); 331 msg = NULL; 332 } 333 } 334 if (db_rget(sp, fline, &p, &len)) 335 goto err; 336 if (fwrite(p, 1, len, fp) != len) 337 goto err; 338 ccnt += len; 339 if (putc('\n', fp) != '\n') 340 break; 341 ++ccnt; 342 } 343 344 if (fflush(fp)) 345 goto err; 346 /* 347 * XXX 348 * I don't trust NFS -- check to make sure that we're talking to 349 * a regular file and sync so that NFS is forced to flush. 350 */ 351 if (!fstat(fileno(fp), &sb) && 352 S_ISREG(sb.st_mode) && fsync(fileno(fp))) 353 goto err; 354 355 if (fclose(fp)) 356 goto err; 357 358 rval = 0; 359 if (0) { 360 err: if (!F_ISSET(sp->ep, F_MULTILOCK)) 361 msgq_str(sp, M_SYSERR, name, "%s"); 362 (void)fclose(fp); 363 rval = 1; 364 } 365 366 if (!silent) 367 gp->scr_busy(sp, NULL, BUSY_OFF); 368 369 /* Report the possibly partial transfer. */ 370 if (nlno != NULL) { 371 *nch = ccnt; 372 *nlno = lcnt; 373 } 374 return (rval); 375 } 376